Locomotive structure



29,.1936. J. c. TRAVILLA, JR 2 LOCOMOT IVE STRUCTURE Filed Jan. 9, 1933 2 Sheets-Sheet 1 //1 van/0r Dec. 29; 1936.

'J. C. TRAVILLA. JR

LOCOMOTIVE STRUCTURE Filed Jan. 9, 1933 2 Sheets-Sheet 2 Awe/War I James jf'aw/h. Jr.

7% 9 v War/ ag Patented Dec. 29, 1936 UNITED STATES PATENT OFFICE.

2,065,632 LOCOMOTIVE STRUCTURE James C. Travilla, Jr., Philadelphia, Pa., assignor t Granite Steel Castings Corporation, Granite City, 111., a corporation of Delaware Application January 9, 1933, Serial No. 650,836

Claims. (01. 105-44) This invention relates to railway rolling stock part a horizontal section taken on the broken line and consists particularly in a novel cylinder sadl--| of Figure 2. dle structure for locomotives. Figure 2 is a vertical transverse sectional view The present tendency in locomotive constructaken on the line 2-2 of Figure l.

5 tion is to form the cylinder saddle, including the Figures 3 and 4 are vertical longitudinal secmain cylinders, steam chests, exhaust passages tions taken on the corresponding section. lines of and central smoke box support integrally, all the Figure 2. parts being included in a single casting, or in a Figure 5 is a view corresponding to Figure 1 but pair of sections bolted together at the middle. illustratinga modification.

The saddle may be formed integral with the main Figures 6 and '7 are vertical longitudinal secunderframe, or provided'with bolting surfaces for tions taken on the corresponding section lines of attachment to underframe longitudinals. In Figure 5. most cases the exhaust passages extend diagonally The cylinder saddle is shown cast integral with from the ends of the steam chests through the the locomotive main underframe and front deck corners of the hollow smoke box support and structure, indicated generally at A. and B, and merge in an exhaust outlet in the center of the including top and bottom horizontal webs. 6 and support and extending upwardly into the smoke l4, outer side walls l5, and inner vertical walls I6 box. Thus the passages merge with and, during forming a box section backbone member extendoperation, impart their heat directly to only ing through the saddle and front deck structure.

small portions of the support webs. Cylinders C are located in the usual position at 20 Accordingly, the walls of the central part of the sides of the underframe; and steam chests D the saddle which are spaced from the cylinders, are supported above the cylinders by means of steam chests, and exhaust passages, remain comwebs E forming connecting steam passages beparatively cold and tend to resist expansion of tween. the cylinders and chests.

5 the exhaust passages under the influence of the The smoke box support is substantially of box hot steam. This condition may result in the section including inclined longitudinal walls I cracking of the saddle walls and particularly the merging at the bottom with the cylinders C and front and rear walls of the smoke box support. with flanges 2 at the top for seating the smoke Also in previous forms substantial parts of the box. Exhaust passages 3 extend directly inwardexhaust passages are located within the smoke ly from the ends of the steam chests at right box support and cannot be readily reached for inangles to the walls I and near the longitudinal spection and repair purposes and the converging center of the saddle curve sharply inwardlyand passages constrict the space between the cylinupwardly, as at 4, and merge in exhaust outlets ders and frame which must be accessible for in- 5 extending into the smoke box (not shown) and spection and repair purposes. flanged for mounting an exhaust nozzle. The 35 The main object of the present invention is to exhaust passages are shown, as of rectangular decrease or eliminate the undesirable differential section. with the lower walls thereof being in thermal stresses referred to above which may realinement with and merging with the top wall 6 sult in damage to the casting. of the underframe.

Another object is to decrease the amount of Extending above the top walls of the exhaust 40 metal used in the cylinder saddle while at the passages and in alinement with the inner walls same time strengthening the tie between the I1 thereof are webs 1 around the upper edges of chest passages and the smoke box support by which the flanges 2 are continued to form an utilizing the exhaust passages as parts of the arcuate smoke box support. Each of the webssmoke box support walls. 1 forming the upper parts of the smoke box sup- 5 Another object is to simplify the construction port front and rear walls extends in a continuous of the cylinder saddle and also facilitate access vertical plane between the walls I, while the porto the inner surfaces of the cylinders and chests tions 3 of the exhaust passages, forming the enand to the exhaust passages for the purpose of tire lower parts of these front and rear walls, are

inspection and repairs. depressed inwardly near the center. A substan- 50 These objects and others are attained substantially horizontal web 8 spaced above the top web tially by the structures illustrated in the a'ccom- 6 of the underframe extends between the lower panying drawings, in which edges of each web 1 and merges with central tri- Flgure l is in part a top view of a cylinder angular elements 8a which close the spaces besaddle struc r il ustrating the invention and in tween the curved portions 4 of the passages and form ofiset continuations of the boiler seating webs I. Openings 8b facilitate molding and cleaning but are closed in the completed structure by plates P welded in place.

In Figures 5 to 7, the underframe is shown as composed of spaced longitudinals F with webs 20 and 21 forming a box-shaped base of the saddle. The saddle construction is in general similar to that just described except that the exhaust passages 9 extend diagonally inwardly from the steam chests through the ends of the inclined longitudinal walls ID of the smoke box support and then transversely along the front and rear walls thereof, the flanged smoke box seating webs ll being in alinement with the outer walls [8 of the exhaust passages instead of the inner walls 7 thereof as in the previous form. In this, as well as the previous form, the lower edges of the webs ll merge with the upper walls of passages 9 and with the horizontal web l2, no other tie being provided between the sharply curving portions l3.

It will be seen that in each of the forms continuous strips of the front and rear walls of the smoke box support from side to side are entirely replaced by the main exhaust passages. This substantially decreases the amount of metal used and, accordingly, the weight of the structure. Since the exhaust passages are coextensive with considerable parts of the smoke box wall, the tie between the chests and smoke box support is strengthened over that in previous forms in which the passages extend diagonally through the support walls. Also substitution of the passages for large portions of the front and rear walls of the smoke box support substantially lessens differential thermal stresses between'the support walls and the exhaust passages referred to above as being present in cast metal saddles of this general type in which different portions of the saddle are subjected to different temperatures by exposure to'the exhaust steam and atmospheric temperatures.

Furthermore, the wide separation of the exhaust passages facilitates access to the inner surfaces of the cylinders and steam chests, and also larger portions of the passages themselves are morereadily accessible than has previously been the case.

Obviously the invention is not limited to the details of the structure as illustrated but may be modified in various respects as will occur to those skilled in the art to which the invention pertains, and the exclusive use of all such modifications as come within the scope of the appended claims is contemplated.

What is claimed is:

1. A locomotive cylinder saddle integral structure including front and back walls, steam chest elements adjacent the ends of said walls, and exhaust passages extending from said elements along both of said walls for substantial distances and then merging in an exhaust outlet, said passages forming continuous strips of said walls from end to end thereof.

2. A locomotive underframe integral cast structure comprising a main frame part, steam chest elements at the sides of said part, mainexhaust passages extending directly inwardly from said elements and merging with the top wall of said part and then curving longitudinally and merging with each other in a central exhaust outlet, and a boiler seating flanged web extending along portions of said passages and above the same, the normal walls of said passages forming substantially the entire lower part of a boiler support wall from side to side and above said main frame member.

3. A locomotive cylinder saddle and boiler support integral cast structure comprising a base part, steam chest elements at the sides of said part, main exhaust passages extending directly inwardly from said elements and then curving longitudinally and merging and thence extending upwardly in a central exhaust outlet, and a boiler seating flanged web extending along portions of said passages, the normal walls of said portions of said passages forming substantially the entire lower part of a boiler support wall above said base member, said web including an upwardly disposed portion and a portion at the lower edge thereof disposed at an angle thereto and closing the space between the longitudinally curved central portions of said passages.

4. A locomotive cylinder saddle integral structure including a base part, steam chest elements at the sides thereof, a boiler support including longitudinal and transverse walls, and main exhaust passages extending inwardly from said elements and having longitudinally curved portions merging in an exhaust outlet, a section of said transverse wall being coextensive with a wall of each of said passages from side to side of the structure and said section being indented to conform with the curved portions of said passages.

5. A locomotive underframe structure including a bracing wall and steam passages extending towards each other along one side of said wall and then curving inwardly through said wall and merging, there being a recess in said wall between the inwardly curving parts of said passages.

JAMES C. TRAVILLA, JB.

CERTIFICATE OF CORRECTION.

Patent No. 2,065,652. December 29, 1936 JAMES C. TRAVILLA, JR.

It is hereby certified that the name of the assignee in the above numbered patent was erroneously described and specified as "Granite Steel Castings Corporation" whereas said name should have been described and specified as General Steel Castings Corporation, of Granite City, Illinois, a corporation of Delaware, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of March, A. D. 1937.

Henry Van Arsdale (Seal) Acting Commissioner of Patents. 

